Heat sealer



FIG. 1 is a front view of a heat sealer showing my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view from front, above and one side thereof; and,

FIG. 8 is a perspective view from above and one side thereof. 

The ornamental design for a heat sealer, as shown and described. 